JPEG/TIFF Image Size & Quality
Thankfully Sony listened to our complaints about having one fixed JPEG mode and with the S75 have added a new "Standard" JPEG mode, this means you can now choose from a variety of image resolutions (2048 x 1536, 2048 x 1360 (3:2), 1600 x 1200, 1280 x 960 and 640 x 480) in combination with either JPEG FINE, JPEG STANDARD or TIFF image quality, a total of 15 different image size / quality combinations.
Standard Test Scene
To give an impression of what some of the combinations of image size and quality produce the table below is a cross reference of some of them:
- 2048 x 1536 TIFF
- 2048 x 1536 FINE JPEG
- 2048 x 1536 STANDARD JPEG
- 1600 x 1200 FINE JPEG
- 1280 x 960 FINE JPEG
- 640 x 480 FINE JPEG
Images below are cropped 240 x 100 area of the image magnified
200% (nearest neighbour).
|2048 x 1536|
9,219 KB (Not available for download)
|1600 x 1200|
|1280 x 960|
|640 x 480|
As you can see close-up there's very little difference between the TIFF and JPEG FINE, if anything the JPEG FINE image seems to look "cleaner" (weird). The overall feeling I'm getting for the S75's images at this stage is that they're slightly softer with less aggressive sharpening than we saw on the S70, I'm all in favour of cleaner sharpening as bad sharpening often introduces unwanted artifacts.
ISO (Sensitivity) Adjustment
ISO equivalence on a digital camera is the ability to increase the sensitivity of the CCD to allow for faster shutter speeds and/or better performance in low light. The way this works in a digital camera is by "turning up the volume" on the CCD's signal amplifiers, nothing is without its price however and doing so also amplifies any noise that may be present and often affects colour saturation.
The S75 now features three selectable ISO sensitivities of 100, 200 and 400 as well as the same Auto mode we saw on the S70 (varies sensitivity between ISO 100 and 300 automatically depending on available light). Our first set of test images were taken under normal light (our standard sensitivity test), however we were so impressed with how clean the higher ISO images were we shot again under dark conditions to push the camera's abilities.
|ISO 100, 1.3 s, F5.0|
|ISO 200, 1/1.3 s, F5.0|
|ISO 400, 1/2 s, F5.0|
As you can see high sensitivity noise is pretty much kept under control with the S75, at least it doesn't appear as we'd normally expect (monochromatic), rather it seems to mostly effect the hue / saturation channels of the image rather than luminance. All in all the S75 performs well at high sensitivities compared to other 3 megapixel digital cameras.
Just as with the S70 (and most other Sony digital cameras) the S75 features four 'post processing' picture effects which can be used to stylise your images.
|No picture effect||Negative Art picture effect|
|Sepia picture effect||Black & White picture effect|
|Solarize picture effect|
Note that as well as this you can use the "TEXT" mode to shoot black and white (2 colour) photocopy style GIF's (useful for copying text, although slow to process) and apply a date-stamp onto the image (same as S70).
- Canon EOS M58.8%
- Panasonic G85/G803.3%
- Panasonic FZ2500/FZ20001.9%
- Panasonic LX10/LX151.2%
- Panasonic GH5 development3.6%
- Sony a99 II15.9%
- Nikon KeyMission 170 and 801.0%
- Fujifilm GFX 50S development28.3%
- Olympus E-M1 II development18.7%
- Olympus E-PL80.1%
- Olympus 25mm F1.2 Pro1.5%
- Olympus 12-100mm F4 IS Pro1.9%
- Olympus 30mm F3.5 Macro0.1%
- Sigma 85mm F1.4 Art3.6%
- Sigma 12-24mm F4 Art2.6%
- Sigma 500mm F4 DG OS HSM Sport2.4%
- YI M12.2%
- GoPro Hero50.8%
- GoPro Karma drone2.2%
|Sunflower Field by GrannyMeg|
from An impressionist piece
|Flag from Staten Island Ferry by wam7|
|SAND SCULPTURE by duskman|
from Landscape - Black and White #4